256532641 has 2 divisors, whose sum is σ = 256532642. Its totient is φ = 256532640.

The previous prime is 256532611. The next prime is 256532677. The reversal of 256532641 is 146235652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182142016 + 74390625 = 13496^2 + 8625^2 .

It is a cyclic number.

It is not a de Polignac number, because 256532641 - 2¹⁹ = 256008353 is a prime.

It is equal to p_14016859 and since 256532641 and 14016859 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 256532597 and 256532606.

It is not a weakly prime, because it can be changed into another prime (256532611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128266320 + 128266321.

It is an arithmetic number, because the mean of its divisors is an integer number (128266321).

Almost surely, 2^256532641 is an apocalyptic number.

It is an amenable number.

256532641 is a deficient number, since it is larger than the sum of its proper divisors (1).

256532641 is an equidigital number, since it uses as much as digits as its factorization.

256532641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

The square root of 256532641 is about 16016.6363822121. The cubic root of 256532641 is about 635.4004880580.

The spelling of 256532641 in words is "two hundred fifty-six million, five hundred thirty-two thousand, six hundred forty-one".